Lock-nut.



No. 844,750. PATBNTED PEB. 19, 1907. H. P. RIBSGHIGK.

LOCK NUT. ABLIGATION FILED DEG.12,1906.

i UFFICE.

HERMAN F. RIESCIIICK, OF FALLS CITY, NEBRASKA.

LOCK-NUT.

Specification of Letters Patent.

Patented Feb. 19, 1907.

Application filed December l2, 1906. Serial No. 347,446.

To all 'u1/9,0111, it may concern:

any other suitable and desirable shape or Be it known that I, HERMAN F. Irnsf conformation and of any desired size and CHICK, a citizen of the United States, residing at Falls City, in the county oi Richardson and State of Nebraska, have invented certain new and useful Improvements in Lock- Nuts, ot which the following is a specification.

This invention relates to lock-nuts for bolts; and it has for its object to present a self-locking nut of simple and improved construction7 which by simply tightening it upon the bolt will engage the surface against which it is tightened in suoli a manner as to prevent it from working loose by shaking or rattling ot the parts or from other ordinary causes.

A further object of the invention is to present a self-locking reversible nut having two opposite locking-faces, either one of which may be placed in locking engagement with the surface against which the nutis tightened.

Still further objects of the invention are to simplify and improve the construction and operation of this class of devices.

Vith these and other ends in view, which will readily appear as the nature ol the invention is better understood, the same consists in the improved construction and novel arrangement and combination of parts, which will be hereinfater fully described, and particularly pointed out in the claims.

In the accompanying drawings has been illustrated a simple and preferred torni ot' the invention, it being, however, understood that no limitation is necessarily made to the precise structural details therein exhibited, but that changes, alterations, and modi'lications within the scope of the invention may be resorted to when desired.

In the drawings, Figure l is a plan view of a lock-nut constructed in accordance with the principles ol the invention. Fig. 2 is an inverted plan view ot the same. Fig. 3 is a transverse sectional view taken on the line 3 3 in Figs. 1 and 2. Fig. 4 is a perspective view. Fig. 5 is a transverse sectional view showing the nut tightened upon a bolt. Fig. 6 is a plan view showing a slightly-modilied form of the nut. Fig. 7 is a side view of the modiiied form.

Corresponding parts in the several figures are denoted by .like characters of reference.

The body l of the improved lock-nut may be square, as shown in the drawings, or of l dimensions, said body being provided with l the centrally-disposed threaded aperture 2, engaging the bolt 3, which latter is of ordinary coi'istruction.

One l'ace F olE the nut is provided with radially-disposed ratchet-grooves 4 4, extending trom the central aperture to the edges of the nut. 'lhe number of these ratchetgrooves may be varied. In Figs. 1 and 4 ot the drawings lour such grooves have been shown, while in Fig. 6 of the drawings there are only two. Under the construction shown in Fig. 4 of the drawings the iront walls 5 ot the ratchet-grooves are at right angles to the `tace F of the nut. In Fig. 7 ol" the drawings the lront walls, here designated 5, arc slightly undercut in order to iorm a relatively sharp engaging edge 6 to prevent reverse rotation ol the nut atter the latter has heen tightened, as will presently appear. The opposite lace G ot the nut is provided with radially-disposed grooves 7, which may be ot approximately U-shaped or V-shaped cross-section. In the process ot stamping or forming said grooves small portions oi: metal may be forced or upset in an inward direction, so as to overhang the central threaded aperture 2, said overhanging portions forming sharp-pointed VIins S, which will have a tendency to grip the bolt and to prevent the rotation ol" the nut thereupon.

In operation the improved lock-nut is reversible and either ol the faces F or G may be exposed to and placed in engagement with the surlace 9, against which the nut is to be tightened, the ratchet-grooves 4 4 being particularly intended lor engagement with metallic and other hard surfaces, while the grooves 7 7 are especially adapted tor cooperation with surfaces ol wood and other similar relatively yielding material. 711011 the nut is tightened against the surlace 9, the latter will be free to expand in the grooves 4 or 7, such expansion being due to the inherent resiliency ol all material to a greater or less degree. Such expansion within the grooves 4 or 7 will naturally obstruct the reverse rotation of` the nut, which will thereby become locked upon the bolt. In case of the ratchet-grooves the sharp edges ol the front l walls of said grooves will positively engage the material ol" the snrlace 9 andserve to i lock the nut. The sharp-pointed Iins S by IOO IOS

at the inner ends of which are formed sharp- 1o pointed fins overllanging the central threadgripping the bolt Will create a degree of friotion which Will materially assist in locking the nut. l ed aperture of the nut.

Having thus described my invention, I In testimony Wliereofl aHiX my signature claim and desire to secure by Letters Patent in presence of tWo Witnesses. of the United Statesi HERMAN F. RIESCHICK.

A reversible self-loeking` nut provided With Witnesses: ratchet-grooves in one or' its faces and pro- JOHN S. CLEAVER, vided in its opposite face With radial grooves l FRED. SEBOLD. 

